SUBVIEW CONTROLLER

From Apple's Documentation:

If you want to divide a view hierarchy into multiple subareas and manage each one separately, use generic controller objects (custom objects descending from NSObject) instead of view controller objects to manage each subarea. Then use a single view controller object to manage the generic controller objects.

This is a generic controller class that can be used to handle a subarea. It is modelled after UIViewController, but conforms to Apple's recommendation.

Your view controller creates the instances and is responsible for managing the subview controllers. Alternatively you can further subdivided your view hierachy and create subview controllers inside other subview controllers. In both cases the controller instantiating the object is responsible for managing the subview controller. The responsible controller is referred to as 'parent controller.' Subclasses can use the view controller when they for example need to show a modal dialog.

Methods that the parent controller should call at the apropriate times are:

- (void)viewWillAppear:(BOOL)animated;
- (void)viewDidAppear:(BOOL)animated;
- (void)viewWillDisappear:(BOOL)animated;
- (void)viewDidDisappear:(BOOL)animated;

- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration;
- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation duration:(NSTimeInterval)duration;
- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation;
- (void)willAnimateFirstHalfOfRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration;
- (void)didAnimateFirstHalfOfRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation;
- (void)willAnimateSecondHalfOfRotationFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation duration:(NSTimeInterval)duration;

- (void)didReceiveMemoryWarning;

Subclasses should always call [super didReceiveMemoryWarning]. This is recommended for all other methods listed above as well.

The loading of the view is similar to how UIViewController loads it views. You can either use the nib based loading, or load the view in -loadView. Do not call [super loadView] in your subclass!

LICENSE

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AUTHOR

Johan Kool is an developer of iOS and Mac OS X (Cocoa and Cocoa touch) software. If you wish to hire me, please look at www.koolistov.net/services.

-- Thanks!

Johan

sleepybrett / subview-controller Goto Github PK